Hi,
It was using the Human Readable ID RVBT-12 to try and find the tickets, but that should be all digits 6366
I had to modify a bunch of files to do it, nothing major, but just came from a couple sources.
We plan to have this fixed for 4.2.1 so you should be good to use that for now and then you can update to 4.2.1 and that will include the fix.
Does that work?